Can't add zoho pop account to another zoho account

Can't add zoho pop account to another zoho account

I set everything up properly,

username *@zoho.com
incoming pop.zoho.com 995
outgoing smtp.zoho.com 465
ssl, authentication



but when I go to save the pop account, it states Unknown host: pop.zoho.com

Is there another way to access 2 zoho accounts from one interface?